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Heikki Linnakangas 3f0e808c4a Introduce the concept of relation forks. An smgr relation can now consist ... of multiple forks, and each fork can be created and grown separately. The bulk of this patch is about changing the smgr API to include an extra ForkNumber argument in every smgr function. Also, smgrscheduleunlink and smgrdounlink no longer implicitly call smgrclose, because other forks might still exist after unlinking one. The callers of those functions have been modified to call smgrclose instead. This patch in itself doesn't have any user-visible effect, but provides the infrastructure needed for upcoming patches. The additional forks envisioned are a rewritten FSM implementation that doesn't rely on a fixed-size shared memory block, and a visibility map to allow skipping portions of a table in VACUUM that have no dead tuples.		18 years ago
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buffer	Introduce the concept of relation forks. An smgr relation can now consist	18 years ago
file	Remove the recently added USE_SEGMENTED_FILES option, and indeed remove all	18 years ago
freespace	Reduce memory consumption during VACUUM of large relations, by using	18 years ago
ipc	Improve CREATE/DROP/RENAME DATABASE so that when failing because the source	18 years ago
large_object	Improve our #include situation by moving pointer types away from the	18 years ago
lmgr	Add a few more DTrace probes to the backend.	18 years ago
page	Change the PageGetContents() macro to guarantee its result is maxalign'd,	18 years ago
smgr	Introduce the concept of relation forks. An smgr relation can now consist	18 years ago
Makefile	Refactor backend makefiles to remove lots of duplicate code	18 years ago